A secret passage speculated to be dating back to 200 years was discovered in the year 2010. The experts and over civic experts said that they could actually see a walkway enclosed by walls at the end of the tunnel. It is said to be an underground passage which was constructed by the British.
Since long, Mughals are admired for their architecture genius. The Red Fort which is situated on Netaji Subhas Marg in Old Delhi has a secret tunnel which connects the Mughal structure to the Yamuna River. From the eastern end of the fort, the tunnel goes underground.
The Amber Palace to the Jaigarh Fort is connected by an open-air tunnel in Jaipur. The tunnel was constructed in18th century and is 325 meters long.
The Talatal Ghar is situated in Rangpur, Assam and was constructed by Tai Ahom architects. The structure is a palace that was mainly built to be an army base. There are two secret underground tunnels in the palace. One is around 3 kilometres long that connects the Ghar to the Dikhow River and the other one is16 kilometres long which connects it to the Garhgaon Palace
Underground tunnels and passages were a great escape route used by Indian emperors in case of an enemy attack. It is believed by a number of people that such tunnel exists between Charminar and the Golkonda Fort in Hyderabad and it is 9 kilometres. Local residents also explain that it's not just one but there are a number of tunnels which are still present in their houses and across Old Hyderabad.
The Indian Army had uncovered a hidden tunnel at Pargwal in Jammu in September 2014. It is a 20-feet deep tunnel which was incomplete, however, it pointed to that trespassers had tried to excavate a tunnel from the other side of LOC to enter in the Indian Territory.
These are some of the secret gateways which people mostly are not aware of. How many have you visited?